An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
The abbreviation of several words into one using the first letter of each word, such as NASA. The representation of abstract ideas or principles by characters, figures, or events in narrative, dramatic, or pictorial form.